Post on 27-Mar-2015
8th Grade
Fremont Jr. High
Scientific Method Review
• Problem• Hypothesis• Experiment/Test
– IV– DV– Constants– Control Group– Experimental Group– Materials– Procedure
• Data Collection• Data Analysis• Conclusion
First
• Identify the Independent Variable (IV) and the Dependent Variable (DV)
NEXT
• Organize Data Using a Table
Independent Variable goes here
Dependent Variable goes here
Then…• Organize
Data Using a Table
Class Period Average Score (%)1 672 714 875 856 98
Science Test
Step 3
• Choose the best graph to display the data.
•Let’s review graphs next…
Which Graph is Best for this Data?
Class Period Average Score (%)1 672 714 875 856 98
Science Test
Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Which Graph is Best for this Data?
Class Period Average Score (%)1 672 714 875 856 98
Science Test
Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
A Bar Graph is Used for Comparison
Class Period Average Score (%)1 672 714 875 856 98
Science Test
Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Which Graph is Best for this Data?Franklin's Class
Grades # of Students
A 9
B 7
C 2
D 1
F 6
Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
Which Graph is Best for this Data?Franklin's Class
Grades # of Students
A 9
B 7
C 2
D 1
F 6
Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Franklin's Class
A36%
B28%
C8%
D4%
F24%
A Pie Chart Shows Percent-Whole Relationships
Franklin's Class
Grades
# of Students
A 9
B 7
C 2
D 1
F 6
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Which Graph is Best for this Data? Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Suzy's Scores
DateTest Scores
(%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
Which Graph is Best for this Data?Science Test
0
20
40
60
80
100
120
1 2 3 4 5
Class Period
Ave
rag
e S
core
(%
)
Franklin's Class
A36%
B28%
C8%
D4%
F24%
Suzy's Scores
DateTest Scores
(%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98
Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
Line Graphs Show Change
over Time
Suzy's Scores
DateTest Scores
(%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98Suzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
0
10
20
30
40
50
60
70
80
90
1st Qtr 2nd Qtr 3rd Qtr 4th Qtr
East
West
North
Create a Graph
Title
X axis label = IV
Y Axis Label
=
DV
Key
Scale
The Axis Labels Have 3 PartsSuzy's Tests
6771
87 85
98
0
20
40
60
80
100
120
January8, 2005
January28, 2005
February17, 2005
March 9,2005
March 29,2005
April 18,2005
May 8,2005
May 28,2005
June 17,2005
Dates
Te
st
Sco
res
(%
)
The Scale
The IV or DV Label
The units of measurement
Data Analysis
• Central Tendency• Relationship between
the IV and DV• Slope of Line (Rate of
Change)
• Highs & Lows• Differences &
Similarities• Error Analysis
Write the Data Analysis
Science Test
ClassPeriod
Average Score (%)
1 67
2 71
3 87
4 85
5 98
Overall, the trend seems to be that scores increase as the day progresses. The highest average was 98%; the lowest 67%. The range is 31; the mean 81.6%; the median 85; there is no mode. This could be because students are more awake and alert later in the day.
This data could be misinterpreted however. It could also be that more “honor” students are in 3rd and 5th hours and this pulls up the average test scores. Further analysis should be done since some students were absent.
Conclusion
• State whether the hypothesis was supported / was not supported.
• summarize the results of your data.
Science Test
ClassPeriod
Average Score (%)
1 67
2 71
3 87
4 85
5 98
The Hypothesis was not supported by the data. Scores increased throughout the day with 5th period scoring 31% higher than 1st period.